What kind of archetype should I have for Emma's pet? (Patreon)

Should have asked this before the other thing. I want there to be some conflict between them, so I don't want her to be just like Emma. I have a few ideas:

1. She's a normal girl who was friends with Emma. Emma opened up to her friend about her shrinking powers, presenting a shrunken bully as a "gift" to her. When Emma's friend freaked out, Emma shrunk her. Now she pretends to be fine with Emma shrinking and eating people but she's really just trying to stay on Emma's good side. She has a little Stockholm syndrome but she still tries to escape sometimes. I'm thinking she'd be a cute redhead, conventionally attractive.

2. Emma's favorite pet is someone that Emma shrunk more recently. She's kind of a psychopath who likes to torment the smaller tinies. I like this character, which I just came across, but I could also save her for something else.

3. Emma has two both of them as tiny companions who she keeps around. They're rivals. The crazy one is bigger, and teases the smaller one. Emma takes them both along. This could be interesting, but would also make things a bit more complicated.